Write the rules proposed by Bohr - Bury for electron distribution.

Explanation

Bohr - bury proposed the following rules for electron distribution.
Rule - 1 : the maximum number of electrons that can be accommodated in each shell is given by a formula `2n^(2)`. Where n is the shell number, which takes the values 1, 2, 3, ……….
Ex : For K shell, n = 1
`therefore` Maximum number of electrons in K shell `=2(1)^(2)=2xx1=2`
Rule - 2 : Each energy level or electron shell is further divided into sub shell. The maximum number of electrons that can be accommodated in each sub shell is 8.
Rule - 3 : Electron cannot be filled in a given shell unless the inner shells are completely fielld.